What is the ratio of allowed to the previously allowed
A recent ordinance was passed to reduce the allowed sound intensity level of the much despised leaf blowers from their current level of 95 dB to 70.0 dB. Under the new law what is the ratio of the allowed to the previously allowed intensity?.
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A thin uniform rod (length = 1.2 m, mass = 2.0 kg) is pivoted about a horizontal, frictionless pin through one end of the rod. (The moment of inertia of the rod about this axis is ML 2/3.) The rod is released when it makes an angle of 37? with the
100 grams of boiling water (temperature 100° C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 950 grams and initial temperature 23° C (the heat capacity of aluminum is 0.9 J/gram/K).
A shopper pushes a cart 50 m south down one aisle and then turns 90.0° west and moves 28 m. He then makes another 90.0° turn and moves 11 m. (a) What is the largest possible displacement of the shopper?
An oil drop carries one excess electron and weighs 9.3 10-15 N. What electric field strength is required to suspend the drop so it is motionless?
A car traveling in a straight line has a velocity of 5.67 m/s at some instant. After 7.37 s, its velocity is 8.04 m/s. What is its average acceleration in this time interval?
A 0.25 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 24° with the horizontal. Determine the speed of the stone.
A pulley system has an efficiency of 87.5% how much of the rope must be pulled in if a force of 648N is needed to lift a 150kg desk 2.46m?
A 60.0 kg crate rests on a level floor at a shipping dock. the coefficients of static and kinetic friction are 0.760 and 0.410, respectively. what horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate acro
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